question_answer

The wavelength of light in two liquids (x) and (y) is \[3500\overset{o}{\mathop{A}}\,\]and \[7000\overset{o}{\mathop{A}}\,\]respectively, then the critical angle of (x) relative to (y) will be:

A) \[60{}^\circ ~\]                       

B) \[45{}^\circ ~\]  

C) \[30{}^\circ \]              

D) \[15{}^\circ \]